From the Chapter Description: Two pretty lace designs are given as examples, so that both ways of charting lace can be clearly demonstrated. The chart for Vortex shows right-side rows only, the wrong-side rows being plain purl rows. The first of these patterns is one of the “illusion” fabrics that can be seen in several ways at once. It is an arrangement of large diamonds divided into quarters of openwork and stockinette stitch, and when looked at from this point of view it shows propellor-shaped motifs that seem to spin around a common center. Or, it may be seen as openwork butterfly shapes, half of them horizontal and half of them vertical, placed in alternating blocks. From either point of view it is interesting and graceful.

Location of Stitch: Chapter 6 - Lace - pages 150-152 from Charted Knitted Design: A Third Treasury of Knitting Patterns.